OpenBGPD is a FREE implementation of the Border Gateway Protocol,
Version 4.
It allows ordinary machines to be used as routers exchanging routes
with other systems speaking the BGP protocol.

Started out of dissatisfaction with other implementations, OpenBGPD
is a fairly complete BGP implementation, powering many sites.
Users often praise its ease of use and high performance, as well as its
reliability.

OpenBGPD is primarily developed by Henning Brauer, Peter Hessler, and
Claudio Jeker.
All of these daemons are part of the
OpenBSD Project.
The software is freely usable and re-usable by everyone under
a BSD license.